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CPU is the “brains” of the computer
Interprets and carries out all the commands issued to it by the SW instructions
1 million times faster to get items from RAM than to get them from the hard drive
Holds instructions for programs that are running; also current data; and any intermediate results
Memory modules SIMMs DIMMs
168-pin DIMMs - -> SDRAM 184-pin DIMMs - -> DDR SDRAM 240-pin DIMMs - -> DDR2 SDRAM
RIMMs
Permanent storage Capacity & spindle speed Interfaces (controllers)
IDE SCSI SATAEIDE Wide SCSI newest typeFast ATA Fast SCSI less susceptible to interferenceATA Ultra Wide data transfer rate (300 MBps) close to
that ofetc. Ultra 2 Wide Ultra SCSI (320 MBps)
etc. 300 MBps = 2400 Mbps compared to USB 2.0
at 480 Mbps and FireWire 800 at 800 Mbps
These 50 stacked 24”-diameter platters could have held about 2 iTunes songs. (The total capacity was 5MB.)
1X DVD drive speed = about 9X CD drive speed 1X DVD = 3.8 MBps = 1385 KBps 1X CD = 150 KBps
Blu-Ray vs HD DVD20th C. Fox Warner BrothersWalt Disney Pictures New Line CinemasMGM Universal StudiosWarner Brothers HBO
* Paramount Pictures* DreamWorks Animation
Apple MS
USB & FireWireUSB 1.1 => 12 Mbps FireWire 400 => 400 MbpsUSB 2.0 => 480 Mbps FireWire 800 => 800 Mbps
FireWire USB
USB
DVI & S-video - high quality connections which allow a pure digital signal to run to a digital flat-panel monitor
DVI
S-video
802.11b: 2.4 GHz 11 Mbps 802.11a: 5.0 GHz 54 Mbps 802.11g: 2.4 GHz 54+ Mbps 802.11n: 2.4 or 5.0 GHz 108+ Mbps